.li {
  padding: 5px;
  border-bottom: 1px solid #999;
}
.remove-btn {
  margin-right: 0.5rem;
}

.item-enter {
  opacity: 0;
}
.item-enter-active {
  opacity: 1;
  transition: opacity 500ms ease-in;
}
.item-exit {
  opacity: 1;
}
.item-exit-active {
  opacity: 0;
  transition: opacity 500ms ease-in;
}